8317977775945 has 4 divisors (see below), whose sum is σ = 9981573331140. Its totient is φ = 6654382220752.

The previous prime is 8317977775937. The next prime is 8317977775999. The reversal of 8317977775945 is 5495777797138.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1680331468176 + 6637646307769 = 1296276^2 + 2576363^2 .

It is a cyclic number.

It is not a de Polignac number, because 8317977775945 - 2³ = 8317977775937 is a prime.

It is a super-2 number, since 2×8317977775945² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831797777590 + ... + 831797777599.

It is an arithmetic number, because the mean of its divisors is an integer number (2495393332785).

Almost surely, 2^{8317977775945} is an apocalyptic number.

It is an amenable number.

8317977775945 is a deficient number, since it is larger than the sum of its proper divisors (1663595555195).

8317977775945 is a wasteful number, since it uses less digits than its factorization.

8317977775945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663595555194.

The product of its digits is 3267280800, while the sum is 79.

The spelling of 8317977775945 in words is "eight trillion, three hundred seventeen billion, nine hundred seventy-seven million, seven hundred seventy-five thousand, nine hundred forty-five".